Spring-winding tool.



A. WORCESTER.

SPRING WINDING TOOL.

APPLICATION FILED JUNE 13,1908.

Patented May 25, 1909;.

m m Q. m E? r ns NORRIS PETERS co-, WASHINGTON, D. c.

ALBERT WORCESTER, OF NEW YORK, N. Y.

SPRING-WINDING TOOL.

Specification of Letters Patent.

Application filed. June 13, 1908.

Patented May 25, 1909.

Serial No. 438,395.

To all whom it may concern:

Be it known that I, ALBERT WoRonsTnR, a subject of the King of England, and resident of the city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Spring-finding Tools, of which the following is a specification.

The present invention relates to improvements in tools for making springs, and more particularly for winding helical springs, either open or closed, that is compression or tension springs.

It is the object of the present invention to provide means, whereby a spring of uniform pitch is formed in a simple and efficient manner even by an unskilled mechanic.

Another object of the invention is to pro vide a structure of the character specified by means of which springs of different diameters may be formed by adjusting certain parts of the apparatus, if closed springs are made, and by adjusting certain parts and re placing other parts when open springs are wound.

These and other advantages will be apparent to the mechanic skilled in the art from an examination of the accompanying drawings and a reading of the specification.

In the accompanying drawings, Figure 1 is a front elevation of the apparatus, Fig. 2 a side elevation, and Fig. 3 a rear elevation of the same.

The frame or support of the apparatus comprises a body portion 1 bent inwardly at its upper end, so as to form a support 2 for the pitch determining means, and provided with a handle 3 at its lower portion by means of which the apparatus may be taken hold of.

Upon the body portion 1 of the frame is rotatably mounted a disk 4, having a plurality of holes 5, 5, parallel with the axis of the disk formed therein, which are of different diameters corresponding to different diameters of springs to be formed. The means which support the disk 4 upon the frame comprise, more particularly, a screw bolt 6,

provided at its inner end with a head 7, between which and the disk 4 are loosely mounted washers 8 and 9 for a purpose hereinafter to be more fully described. The outer end of the screw bolt 6 is provided with screw threads, engaging the threads of a wing-nut 10, by means of which the disk 4 may be fixedly secured against rotation to the frame of the apparatus.

Upon the peripheral portion 11 of the disk 4 are formed a plurality of radially arranged holes 12, 12, one for each hole 5. Each of these holes 12 passes from the peripheral portion 11 of the disk into the cylindrical holes 5, and each is provided at its outer portions 18 with screw threads, engaging the threads 14 of the screw bolts 15, the inner ends of which bolts operatively engage a member 16, preferably made of soft metal, which member is arranged suitably in the holes 12 and may be shifted by the screw bolts 15 so as to project more or less into the holes 5 for a purpose hereinafter to be described.

The pitch adjusting means comprise a hook-shaped member 17, adjustably supported by the portion 2 of the frame. More particularly the upper end of the hook shaped member 17 passes through the por tion 2 and is provided with screw threads 18 at its upper end, meshing with the threads of a wing-nut 19.

In using the instrument, first a mandrel 20 of a desired size, corresponding to the inner diameter of the spring to be formed, is mounted upon the chuck 21 of a lathe. The wing-nut 10 is loosened, whereby the disk 4 may be turned, and thus the appropriate hole 5, the diameter of which corresponds to the diameter of the mandrel 20 now upon the chuck 21, is brought to coincide with the hole 25, formed in the body portion 1 of the frame of the apparatus. Thus the apparatus may be brought upon the mandrel 20, by passing the same through the holes 5 and 25, coinciding.

The end of the wire 23 is now drawn through the transverse hole 24 of the bolt 6 and secured at its end 22 to the chuck 21. The wire is thus placed between the two washers 8 and 9, which are together with the disk 4 secured against rotation by means 01' the wing-nut 10, whereby at the same time that portion of the wire which lies between the end 22 and the hole 2 1' of the bolt 6 is under a certaindegree of tension.

The pitch determining hook 17 is now engaged with the mandrel 20 and adjusted by means of the wing-nut 19 so that it firmly presses against the mandrel 20, whereby it is kept in a determined and fixed position.

The wire 23, of course, passes over the hook,

17, and when now the tool is taken hold of by means of its handle 3 and the chuck 21 rotated, a helical spring of a pitch, which corresponds to the thickness of the hook 17, is formed, which spring may be rightor lefthanded according to the direction in which the chuck 21 is rotated. As the spring forms, the tool 1 is slowly moved longitudinally on the mandrel 20, it being obvious that it does not require any great care to form a spring of uniform pitch, since the thickness of the hook 17 determines the same. I

Obviously in replacing the hook 17 with other hooks, different springs of different pitches may be formed.

When it is desired to form a closed spring, the pitch of which is equal to zero, the hole 5 which corresponds to the inner diameter of the spring to be formed is brought to coincide with the hole 26 of the body portion 1 of the frame. The tool is then placed in the manner, hereinbefore described, upon the mandrel 20, the wire passing again through the hole 24 of the bolt 6 and to the chuck 21. In order that the portion of the wire which lies between the washer and the chuck should be under equal tension during the operation, the screw 15 of the hole through which the mandrel is placed is operated so that the member 16 forms a frictional brake, producing thus an even tension during the operation. Rotating now the chuck 21, a closed spring is produced in a simple and ellicient manner.

In the manner described old springs may be rewound by drawing the same out and passing one end through the hole 24 and thence to the chuck. By drawing the spring through the hole under tension, the wire is stritightened out and rewound into a new col What I claim is:

1. In a tool for winding wire into a spring coil, the combination with a rotating maning a transverse hole through which the wire passes, one end of which wire is secured to said mandrel, a plurality of washers arranged on said screw bolt and engaging said wire, and means on said bolt for securing said washers and said disk against rotation to said tool carrier.

2. In atool for winding wire into a spring coil, the combination with a rotating mandrel, of a tool carrier arranged thereon and adapted to be shifted longitudinally on the same, a disk arranged on said tool carrier and engaging said mandrel, a screw bolt for securing said disk to said tool carrier and having a transverse hole through which the wire passes, one end of which wire is secured to said mandrel, a plurality of washers arranged on said screw bolt and engaging said wire, means on said bolt for securing said washers and said disk against rotation on said tool carrier, and means for determining the pitch of the coil to be formed.

3. In a tool for winding wire into a spring coil, the combination with a rotating mandrel, of a tool carrier arranged thereon and adapted to be shifted longitudinally on the same, a disk arranged on said tool carrier and engaging said mandrel, a screw bolt for securing said disk to said tool carrier and. having a transverse hole through'which the wire passes, one end of which wire is securedto said mandrel, a plurality of washers arranged on said screw bolt and engaging said wire, means on said bolt for securing said washers and said disk against rotation to said tool carrier, and means adjustably ar' ranged on said tool carrier for determining the pitch of the coil to be formed.

4. In a tool for winding wire into a spring coil, the combination with a rotating mandrel, of a tool carrier arranged thereon and adapted to be shifted longitudinally on the same, a disk arranged on said tool carrier and engaging said mandrel, a screw bolt for securing said disk to said tool carrier and having a transverse hole through which the wire passes, one end 01' which wire is secured to said mandrel, a plurality of washers arranged on said screw bolt and engaging said wire, means on said bolt for securing said washers and said disk against rotation to said tool carrier, and a hook-shaped mem-' ber carried by said tool carrier, the thickness of which hook-shaped member determines the pitch of the coil to be formed.

5. In a tool for winding wire into a spring coil, the combination with a rotating mandrel, of a tool carrier arranged thereon and adapted to be shifted longitudinally on the same, a disk arranged 011 said tool carrier and engaging said mandrel, a screw bolt for arranged on said screw bolt and engaging Signed at New York, in the county of said Wire, means on said bolt for securing New York and State of New York, this 8th said washers and said disk against rotation day of June, A. D. 1908.

to said tool carrier, and a hook-shaped mem- ALBERT WVORCESTER. ber adjustably carried by said tool carrier \Vitnesses: and engaging said mandrel for determining SIGMUND HERZOG,

the pitch of the coil to be formed. S. BIRNBAUM. 

